* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
  }
  
  body {
    max-width: 750px;
    min-width: 300px;
    font-size: 15px;
    background-color: whitesmoke;
  }
  header{
    width: 100%;
    height: 1.5rem;
    line-height: 1.5rem;
    background-color: white;
    display: flex;
    font-size: .15rem;
    .left{
        width: 15%;
        text-align: center;
    }
    .title{
        width: 70%;
        text-align: center;
    }
}
.box{
    width: 4rem;
    height: 4rem;
    border-radius: 2.25rem;
    color: white;
    font-size: 2.8rem;
    text-align: center;
    margin: 2rem auto;
    line-height: 4rem;
    background-color: hotpink;
}
.box1{
    font-size: 1rem;
    text-align: center;
    margin-bottom: .7rem;
}
.box2{
    text-align: center;
    font-size: .3rem;
    color: #66666f;
    margin-bottom: 2rem;
}
.box3{
     width: 65%;
     height: 2rem;
     line-height: 2rem;
     text-align: center;
     margin: 0 auto;
     background-color: hotpink;
     color:white;
     font-size: .3rem;
     border-radius: .5rem;
}
.box4{
     width: 65%;
     height: 2rem;
     line-height: 2rem;
     text-align: center;
     margin: 0 auto;
     background-color: transparent;
     border: 1px solid #ddd;
     color:hotpink;
     font-size: .3rem;
     border-radius: .5rem;
}